Trying to build 1.7.4rc2r30303 with gcc on linux/mips32 yields the
following failure:

CXX mpicxx.lo
/home/phargrov/OMPI/openmpi-1.7.4-latest-linux-mips32/openmpi-1.7.4rc2r30303/ompi/mpi/cxx/mpicxx.cc:31:2:
warning: #ident is a deprecated GCC extension
In file included from
/home/phargrov/OMPI/openmpi-1.7.4-latest-linux-mips32/openmpi-1.7.4rc2r30303/opal/class/opal_pointer_array.h:37,
from
/home/phargrov/OMPI/openmpi-1.7.4-latest-linux-mips32/openmpi-1.7.4rc2r30303/ompi/errhandler/errhandler.h:32,
from
/home/phargrov/OMPI/openmpi-1.7.4-latest-linux-mips32/openmpi-1.7.4rc2r30303/ompi/mpi/cxx/mpicxx.cc:37:
/home/phargrov/OMPI/openmpi-1.7.4-latest-linux-mips32/openmpi-1.7.4rc2r30303/opal/threads/mutex.h:
In function 'int64_t OPAL_THREAD_ADD64(volatile int64_t*, int)':
/home/phargrov/OMPI/openmpi-1.7.4-latest-linux-mips32/openmpi-1.7.4rc2r30303/opal/threads/mutex.h:292:
error: 'opal_atomic_add_64' was not declared in this scope